You're going to get many different opinions on this. Here are mine, for what they're worth.
We have two kids, about the same ages as yours 7 and 10. For our family, the most important things to us are a good night's sleep, quick transportation to the parks and a pool slide. We have stayed at many resorts - GF, WL, AKL, CR, CSP, PO, FW cabin,OKW, BWV, Swan and Dolphin, ASM and ***. Here are our favorites based on those three things.
We really like the AKL because the kids enjoy the animals, the busses are not shared, the pool has a slide, and they have bunk beds! Bunks allow everyone to get a better night's sleep, including mom. (I don't have to get up and move someone's feet out of the other's back).
We liked the CR, too, because you can walk to MK (which is where we spend most of our time) and it was a daybed (really sleeps 5). This resort isn't as "themed" as the others but it has a great arcade the kids loved. (Nice break from the parks). It has a pool slide, too. You also have access to water sports here, good shopping, a great fireworks view of MK and character meals.
WL also has bunks but I did not like the bus service. If I remember correctly, we shared with GF and Poly and WL was the last stop. This meant standing during crowded hours. I also thought it was noisy. (The kids were really small - napping age- and the boats were really loud. I could also hear my neighbor using the bathroom. Yuck.). It is one of the most beautiful resorts and many people really love it. We enjoyed the resteraunts. I would stay here again and give it another try if the price was right.
We like the locations of BWV, Swan and Dolphin. You can walk to MGM and EPCOT. BW has a neat clown slide the kids really enjoy. There are no bunks.
Our favorite moderate is CSR because it has direct bus service and a fun, fast slide.
Good luck making a decision. There are lots of good choices!